Note: Unless you are using a severely outdated operating system or CPU, you most likely want to always download the x64 (64-bit) version of Ultimate Doom Builder.
The 64-bit version has less limitations on the total size of the project that you can load and edit, while the x86 (32-bit) version of Ultimate Doom Builder only exists for compatibility with older PCs.
If not sure, follow these instructions to find out whether your system is 64-bit: Which version of Windows operating system am I running?
The 64-bit version has less limitations on the total size of the project that you can load and edit, while the x86 (32-bit) version of Ultimate Doom Builder only exists for compatibility with older PCs.
If not sure, follow these instructions to find out whether your system is 64-bit: Which version of Windows operating system am I running?
All recent versions
Ultimate Doom Builder R4229
20 Apr 2025
Sound Propagation Mode: improved performance of the sound leak finder
Ultimate Doom Builder R4228
18 Apr 2025
Visual Mode: fixed a problem where vertical alignment of middle textures could go wrong when 3D floor were involved
Ultimate Doom Builder R4227
18 Apr 2025
3D Floor Mode: fixed a crash when entering relative values in some input boxes
Ultimate Doom Builder R4226
11 Apr 2025
Allow script configuration autoloading through command line arguments (#1187)
Ultimate Doom Builder R4225
06 Apr 2025
Added support for compilation using `zt-bcc` (#1185)